Keep in mind that TV series and movies are apples and oranges much more these days then when everything was under one roof. Viacom and CBS are now two completely different companies with seemingly opposite views of Star Trek
Viacom - Only holds the movie rights to Star Trek and they have done everything in there power to promote Star Trek and it has payed off so far.
CBS - Owns all the primary rights to Star Trek, including TV, Media, Gaming, Books etc.. they hold the cards to Star treks non-movie life. From what I have heard from people that deal with people working for CBS over the past couple years is they just have no interest to do anything major (tv series) with Star Trek and are in observer mode seeing what happens with the film. CBS is even staying away from Scifi in general, how many Scifi shows do you see in there line up? CBS is keeping with its drama and procedurals (Csi etc..) formula, which has worked for them so far. Another example of is, CBS all but trashing startrek.com , firing its staff (Marc, Tim etc..) and keeping it a shell of its former self, heck they did not even allow Viacom to use it (Viacom created its own state of the art site, startrekmovie.com to promote the film) .
I would have liked to have seen the complete rights to Star Trek go to Viacom and nothing for CBS when the split happened 3 years ago but I guess at the time CBS had a better infrastructure to support it. Unless you can absolutely guarantee CBS major profits from a another Star Trek series, don't expect them to do anything for a while.